JP3637753B2 - Chair armrest device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest device for a chair, and more particularly to an armrest device for a chair whose armrest portion can be adjusted in the vertical angle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has already been provided an armrest portion whose vertical angle can be adjusted with respect to a support portion rising from a seat portion or a leg portion of a chair. As the angle adjustment mechanism of the armrest part, the central part of the armrest part is pivotably attached to the upper end of the support part, and a plurality of engagement recesses are formed at predetermined intervals in the front and rear end parts of the support part. In addition, there are some which adjust the angle in multiple stages by elastically fitting an engaging portion which is provided at one end portion of the armrest in the front and rear ends to the engaging recess.
[0003]
However, since the conventional angle adjustment mechanism of the armrest portion exposes the operation portion on the lower surface of the front portion of the armrest portion, an operation lever provided with an engagement portion is pivotally attached to the lower cover member of the armrest portion, and the operation is performed. This is a structure in which the engaging portion is engaged with and disengaged from the engaging concave portion by rotating the lever. Therefore, it is difficult to assemble the angle adjustment mechanism consisting of the engaging portion of the operation lever provided inside and the engaging recess provided in the support portion while joining the upper cover member and the lower cover member to the armrest portion. Precision is also required. Further, there is a problem that it is difficult to attach an elastic body such as a tension coil spring or a kick spring for elastically urging the operation lever.
[0004]
[Problems to be solved by the invention]
In view of the above-described situation, the present invention intends to solve the problem of simplifying the structure of the vertical angle adjustment mechanism of the armrest part and easily assembling it, thereby reducing the cost. In addition, the present invention is to provide a chair armrest device having excellent operability.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is an armrest device for a chair in which an armrest portion can be vertically adjusted with respect to a support portion rising from a seat portion or a leg portion. A fixed tilting member is connected to a horizontal support shaft so as to be tiltable up and down, and a plurality of engaging recesses are formed in the support portion in the vertical direction, and the armrest portion is predetermined by engaging with any of the engaging recesses. An armrest device for a chair is provided in which stopper means for maintaining the angle and its operating means are provided on the tilting member.
[0006]
Specifically, an intermediate portion of the rotating member supported by a horizontal rotating shaft is attached to the front portion of the tilting member, and the free end side end of the rotating member is engaged with the engaging recess. An engaging portion is provided as a stopper means, and an operating portion exposed at the front end of the armrest portion is provided at the other end of the free end of the rotating member as an operating means, and the engaging portion is engaged with the engaging recess. The rotating member is elastically biased in the rotating direction to be combined. Here, the operation portion is exposed on the lower surface or side surface of the armrest portion, and particularly when the width and thickness of the armrest portion are large, the operation portion is arranged on the side surface of the armrest portion in order to improve operability. It is preferable to provide in.
[0007]
Also, an intermediate portion of a rotating member supported by a horizontal rotating shaft is attached to the front portion of the tilting member, and an engaging portion that engages with the engaging recess at one free end side of the rotating member A stopper means is provided, and an operating portion is provided at the other end of the free end side of the rotating member, and an inclined surface formed on the front end of the push button exposed on the front side surface of the armrest is stopped against the operating portion. Thus, the rotating member is elastically biased in the rotation direction in which the engaging portion engages with the engaging recess.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 to 4 show a first embodiment of an armrest device according to the present invention, FIGS. 5 to 7 show a second embodiment of the present invention, and FIGS. 8 to 10 show a third embodiment of the present invention. 2, 6 and 9 show a state in which the armrest portion is set substantially horizontally, FIGS. 3 and 7 show a state in which the armrest portion is tilted forwardly, and FIG. 4 shows an exploded perspective view of the main part. In the figure, reference numeral 1 denotes a leg portion of the chair, 2 denotes a seat portion, 3 denotes a backrest portion, 4 denotes an armrest device, 5 denotes a support portion, and 6 denotes an armrest portion.
[0009]
The armrest device 4 according to the embodiment of the present invention is such that the armrest portion 6 can be adjusted in height and vertically adjustable with respect to the support portion 5 rising from the seat portion 2 or the leg portion 1. The support portion 5 has a structure in which a hollow elevating body 8 is externally fitted on an upper portion of a support arm 7 fixed to the seat portion 2 so as to be vertically slidable. A height adjusting mechanism is provided between the support arm 7 and the lifting body 8 to adjust the height of the lifting body 8 with respect to the support arm 7 and to maintain the height.
[0010]
First, the armrest device 4 according to the first embodiment of the present invention will be described in more detail with reference to FIGS. In the armrest device 4 of the present invention, a tilting member 9 fixed in the armrest portion 6 is connected to an upper end of the support portion 5 so as to be vertically tiltable by a horizontal support shaft 10, and a plurality of upper and lower portions are connected to the support portion 5. The engaging member 11 is formed with a stopper means 12 for engaging with any of the engaging recessed parts 11 to maintain the armrest part 6 at a predetermined angle and its operating means 13 on the tilting member 9. It is.
[0011]
More specifically, the armrest portion 6 is formed in a hollow shape by joining an upper cover member 14 and a lower cover member 15 made of synthetic resin, and the upper cover member 14 has a plurality of reinforcing ribs 16 on the lower surface. The pedestals 17 and 17 for mounting the tilting member 9 are integrally formed, and the lower cover member 15 is formed with an opening 18 for receiving the elevating body 8 constituting the support portion 5. Then, the reinforcing plate 19 made of a metal plate is screwed and fixed to the pedestals 17 and 17 in contact with the lower edges of the reinforcing ribs 16 to secure the strength and rigidity of the armrest portion 6. The tilting member 9 is integrally fixed to the lower surface of 19.
[0012]
The tilting member 9 is formed by bending a metal plate, and the side plates 21 and 21 are bent downward on both sides of the top plate 20, and the upper part of the lifting body 8 is placed between the side plates 21 and 21. It can be accommodated. A shaft hole 22 through which the support shaft 10 is inserted is formed in the rear portion of the side plate 21 of the tilting member 9, and a front stop plate 23 is formed by bending the front portion of the top plate 20 downward. In addition, a horizontally long slit hole 24 is formed below the corresponding stop plate 23. Further, through holes 25 and 25 are formed in front of the stopper plate 23 and above the side plates 21 and 21.
[0013]
And the intermediate part of the rotation member 26 which bent and formed the metal plate in the square shape is attached to the front part of the said tilting member 9 so that rotation is possible. For example, a shaft cylinder 27 fixed to the bent portion of the rotating member 26 is disposed between the upper portions of the side surface plates 21 and 21 of the tilting member 9, and a horizontal rotating shaft inserted into the through holes 25 and 25. It is inserted into 28 so as to be rotatable. And, at the free end side end of the rotating member 26, an engaging portion 29 that penetrates the slit hole 24 and engages with the engaging recess 11 is bent at a right angle to form the stopper means 12. In addition, an operation portion 31 exposed on the lower surface from an operation hole 30 opened in the lower cover member 15 of the armrest portion 6 is provided at the other end of the rotating member 26 on the free end side to form the operation means 13. Further, a tension coil spring is provided between the rotating member 26 and the side plate 21 of the tilting member 9 so as to elastically bias the rotating member 26 in the rotation direction in which the engaging portion 29 engages with the engaging recess 11. 32 is interposed. A kick spring is used in place of the tension coil spring 32, and the coil portion of the kick spring is wound around the rotating shaft 28, and both elastic legs are locked to the rotating member 26 and the side plate 21 of the tilting member 9. May be.
[0014]
Then, in a state where the rotation member 26 constituting the stopper means 12 and the operation means 13 is mounted on the tilting member 9, the tilting member 9 is directly attached to the armrest portion 6 via the reinforcing plate 19 as in the present embodiment. The upper part of the elevating body 8 is received between the side plates 21, 21 of the tilting member 9 with the upper part of the elevating body 8 being inserted into the opening 18 of the lower cover member 15 and attached to the upper cover member 14. The support shaft 10 is inserted through and attached to the shaft holes 22 and 22 formed in the face plates 21 and 21 and the through hole 33 formed in the rear upper end of the elevating body 8, and finally the lower cover member 15 is lifted and the upper cover member 14 is lifted. Are assembled by being joined by appropriate fixing means such as fitting or screwing.
[0015]
Then, when the operating portion 31 exposed on the lower surface is pushed in from the square hole 30 of the lower cover member 15 of the armrest portion 6, the rotating member 26 rotates about the rotating shaft 28, and the engaging portion 29 moves up and down. After disengaging from the engaging recess 11 formed on the upper front side of the body 8, the front part of the armrest part 6 is in a state where the angle can be adjusted up and down around the support shaft 10, and the armrest part 6 is set to a predetermined angle, When the finger is released from the operation portion 31, the engagement portion 29 is engaged with any of the engagement recesses 11 by the elastic biasing force of the tension coil spring 32, and the set angle is maintained.
[0016]
Here, FIG. 2 is a state in which the armrest portion 6 is in a substantially horizontal state, and usually the front portion of the armrest portion 6 is in the most lowered state, and FIG. 3 is inclined by raising the front portion of the armrest portion 6. State. The angle of the armrest portion 6 may be adjusted so that the upper surface of the armrest portion 6 faces the front edge of the desk after adjusting the height of the seat portion 2 and the height of the armrest portion 6 according to the physique of the seated person. desirable. When the angle of the armrest 6 is set as described above, the mouse as one of the input means of a word processor or a personal computer is operated with the elbow placed on the upper surface of the armrest 6 and the wrist placed on the tabletop. It can be done, so that operation becomes easier. The same applies when the keyboard is operated.
[0017]
Next, 2nd Embodiment of the armrest apparatus 4 of this invention is described in more detail based on FIGS. The armrest device 4 of the present embodiment is basically the same structure as that of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. Here, only the configuration different from the first embodiment will be described. The armrest device 4 of the present embodiment has a simple shape in which the side plates 21 and 21 are bent on both sides of the top plate 20 as the tilting member 9, and the rear portions of the side plates 21 and 21 are supported as described above. 10 is pivotally attached to the rear upper end of the lifting body 8 so as to be vertically rotatable, and is bent at the front portion of the side plates 21 and 21 at the intermediate portion of the rotary member 26 having a square shape when viewed from the side by the rotary shaft 28. Is rotatably supported. Further, a plurality of horizontally long engaging recesses 11 are provided on the front end of the elevating body 8 in the vertical direction and penetrated on both sides, and the rear ends of the engagement recesses 11 are communicated with the floating portions 34. doing.
[0018]
As the stopper means 12, a long ring portion 35 is formed at the tip of the free end side end of the rotating member 26, and a locking pin 29 </ b> A constituting the engaging portion 29 is provided on the ring portion 35. The locking pin 29A is inserted into the engaging recess 11 and inserted. Further, as the operating means 13, an operating portion 31 is formed that extends at a right angle to the distal end portion on the free end side of the rotating member 26, and the operating portion 31 is opened on the side surface of the armrest portion 6. It is exposed from the operation hole 30. In addition, it is preferable that a knob is appropriately provided at the tip exposed portion of the operation portion 31. Further, a tension coil spring 32 is interposed between the rotating member 26 and the front end of the side plate 21 of the tilting member 9, and the rotating member 26 is elastic in the rotational direction in which the engaging portion 29 engages with the engaging recess 11. Energized.
[0019]
In the case of the present embodiment, when the operation portion 31 exposed on the front side surface of the armrest portion 6 is lifted, the rotation member 26 rotates about the rotation shaft 28 to form the engagement portion 29. The pin 29A moves away from the engagement recess 11 while moving inside the ring portion 35 and is positioned in the floating portion 34. In this state, the front portion of the armrest portion 6 is rotated up and down around the support shaft 10. After setting the predetermined angle, if the finger is released from the operation portion 31, the engagement portion 29 is again engaged with any of the engagement recesses 11 by the elastic biasing force of the tension coil spring 32, and the set angle is maintained. It is.
[0020]
Finally, an armrest device 4 according to a third embodiment of the present invention will be described with reference to FIGS. The armrest device 4 of the present embodiment has the same basic structure as that of the first embodiment, but has a structure in which only the operating means 13 is different. The operating means 13 of this embodiment is provided with an operating portion 31 at the other end on the free end side of the rotating member 26 and the tip of the push button 36 exposed from the operating hole 30 provided in the front side surface of the armrest portion 6. The wedge-shaped inclined surface 37 formed in the above is stopped against the operation portion 31, and the operation portion 31 is lifted by pushing the push button 36, so that the rotating member 26 is rotated and the engagement portion 29 is moved from the engagement recess 11. It is intended to come off. Since other configurations are the same as those described above, the same components are denoted by the same reference numerals and description thereof is omitted.
[0021]
【The invention's effect】
The chair armrest device of the present invention constructed as described above is incorporated in the tilting member that fixes the main part of the vertical angle adjustment mechanism of the armrest portion inside the armrest portion, so that the assembly is simple and the manufacturing cost is greatly reduced. The vertical angle of the armrest can be easily adjusted.For example, when operating a word processor or computer mouse or keyboard placed on a tabletop, the height of the armrest's mouth is set to the tabletop Even when the front end of the armrest is set to approximately the same height as the front edge of the tabletop and the wrist is comfortably supported, the armrest is angled by shouldering the armrest. The optimum distance can be secured.
[Brief description of the drawings]
FIG. 1 is a side view of a chair to which an armrest device according to a first embodiment of the present invention is applied.
FIG. 2 is an enlarged longitudinal sectional view of a main part when the armrest is in a substantially horizontal state.
FIG. 3 is an enlarged vertical cross-sectional view of the main part when the armrest is in an inclined state.
FIG. 4 is an exploded perspective view of the same.
FIG. 5 is a side view of a chair to which an armrest device according to a second embodiment of the present invention is applied.
FIG. 6 is a partially enlarged longitudinal sectional view of a main part when the armrest is in a substantially horizontal state.
FIG. 7 is a partially enlarged longitudinal sectional view of a main part when the armrest is in an inclined state.
FIG. 8 is a side view of a chair to which an armrest device according to a third embodiment of the present invention is applied.
FIG. 9 is a partially enlarged cross-sectional view of the main part of the same.
FIG. 10 is a partially enlarged cross-sectional view of the main part of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Backrest part 4 Armrest apparatus 5 Support part 6 Armrest part 7 Support arm 8 Lifting body 9 Tilt member 10 Support shaft 11 Engagement recessed part 12 Stopper means 13 Operation means 14 Upper cover member 15 Lower cover member 16 Reinforcing rib 17 Base 18 Opening 19 Reinforcing plate 20 Top plate 21 Side plate 22 Shaft hole 23 Stop plate 24 Slit hole 25 Through hole 26 Rotating member 27 Shaft cylinder 28 Rotating shaft 29 Engaging portion 30 Operating hole 31 Operating portion 32 Tension coil spring 33 Through hole 34 Free moving part 35 Ring part 36 Push button 37 Inclined surface

Claims (4)

An armrest device for a chair in which an armrest portion can be adjusted in an up / down angle with respect to a support portion rising from a seat portion or a leg portion, and a tilting member fixed in the armrest portion at the upper end of the support portion is vertically moved by a horizontal support shaft. A stopper means that is connected to be tiltable, has a plurality of engaging recesses in the upper and lower portions, and engages with any of the engaging recesses to maintain the armrest at a predetermined angle, and its operating means. An armrest device for a chair, which is provided on a tilting member. An intermediate portion of the rotating member supported by a horizontal rotating shaft is attached to the front portion of the tilting member, and an engaging portion that engages with the engaging recess is provided at one end of the rotating end of the rotating member. The stopper means is provided, and the other end of the rotating member is provided with an operating portion exposed at the front portion of the armrest portion so that the engaging portion engages with the engaging recess. The armrest device for a chair according to claim 1, wherein the rotating member is elastically biased. The armrest device for a chair according to claim 2, wherein the operation portion is exposed on a lower surface or a side surface of the armrest portion. An intermediate portion of the rotating member supported by a horizontal rotating shaft is attached to the front portion of the tilting member, and an engaging portion that engages with the engaging recess is provided at one end of the rotating end of the rotating member. This is a stopper means, and an operation part is provided at the other end of the free end of the rotating member, and an inclined surface formed at the tip of the push button exposed on the front side surface of the armrest part is stopped against the operation part. 2. The armrest device for a chair according to claim 1, wherein the arm member is configured as an operating means and elastically biases the rotating member in a rotation direction in which the engaging portion engages with the engaging recess.

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